Electronic Raman response in anisotropic metals

Details Electronic Raman response in anisotropic metals Electronic Raman response in anisotropic metals

2004-11-17

arxiv.org/abs/cond-mat/0411445v1

Physics

Condensed Matter

Superconductivity

5 pages, 4figures. accepted in PRB (Brief Report), in press

Scientific paper

10.1103/PhysRevB.70.172507

Using a generalized response theory we derive the electronic Raman response function for metals with anisotropic relaxation rates. The calculations account for the long--range Coulomb interaction and treat the collision operator within a charge conserving relaxation time approximation. We extend earlier treatments to finite wavenumbers ($|{\bf q}|\ll k_{\rm F}$) and incorporate inelastic electron--electron scattering besides elastic impurity scattering. Moreover we generalize the Lindhard density response function to the Raman case. Numerical results for the quasiparticle scattering rate and the Raman response function for cuprate superconductors are presented.

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